Can you think of any three-dimensional shape that comprises of exactly two surfaces?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What seven-letter word has hundreds of letters in it?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

Who has married many women but was never married?

What work can one never finish?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Replace the question mark with the correct number in the below-given picture?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?